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Table 2

Observational parameters for the three L-type BDs.

System name RA Dec Obs. date (UT) K (mag) iTime (s) S/N Seeing(″) Std star
J0835 08 35 42.53 −081915.85 2023-01-02 11.14 ± 0.02 (5) 1200 70 ~0.7 pi.05 Ori
J0501 05 01 24.09 −001049.19 2023-02-02 12.96 ± 0.04 (5) 3600 20 ~0.8 HD 31331
J0500 05 00 21.01 033045.40 2023-02-28 12.06 ± 0.02 (5) 5400 40 ~0.7 3 Hya

Notes. The parameters include observation date, apparent K-band magnitudes from the 2MASS catalogue (Cutri et al. 2003), total integration time, S/N at 2166 nm, and standard star used for telluric corrections.

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